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  1. A hybrid conjugate gradient algorithm for solving relative orientation of big rotation angle stereo pair
    Author: LI Jiatian; WANG Congcong; JIA Chenglin; NIU Yiru; WANG Yu; ZHANG Wenjing; WU Huajing; LI Jian
    Published: 2019
    Publisher:  Surveying and Mapping Press

    The fast convergence without initial value dependence is the key of large angle relative directional solution. Therefore, a hybrid conjugate gradient algorithm is proposed in this paper. The concrete process is:① stochastic hill climbing(SHC)... more

     

    The fast convergence without initial value dependence is the key of large angle relative directional solution. Therefore, a hybrid conjugate gradient algorithm is proposed in this paper. The concrete process is:① stochastic hill climbing(SHC) algorithm is used to make random disturbance to the given initial value of the relative directional element, and the new value to guarantee the optimization direction is generated; ② In local optimization, super-linear convergent conjugate gradient method is used to replace the steepest descent method in relative orientation to improve its convergence rate; ③ The global convergence condition is that the calculation error is less than the prescribed limit error. The comparison experiment shows that the method proposed in this paper is independent of initial value, has higher accuracy and fewer iterations.

     
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    Source: BASE Selection for Comparative Literature
    Language: Chinese
    Media type: Article (journal)
    Format: Online
    Parent title: Acta Geodaetica et Cartographica Sinica, Vol 48, Iss 3, Pp 322-329 (2019)
    Subjects: relative orientation; big rotation angle; global convergence; stochastic hill climbing algorithm; conjugate gradient algorithm; Mathematical geography. Cartography
  2. A local variation method for bilevel Nash equilibrium problems
    Author: Caruso, Francesco; Ceparano, Maria Carmela; Morgan, Jacqueline
    Published: July 2021
    Publisher:  CSEF, Centre for Studies in Economics and Finance, Department of Economics, University of Naples, Naples, Italy

    Access:
    Verlag (kostenfrei)
    Verlag (kostenfrei)

    Location:
    ZBW - Leibniz-Informationszentrum Wirtschaft, Standort Kiel
    Signature:
    VS 660
    Inter-library loan:
    No inter-library loan
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    Source: Union catalogues
    Language: English
    Media type: Book
    Format: Online
    Series: Working paper / CSEF, Centre for Studies in Economics and Finance ; no. 620
    Subjects: Bilevel Nash equilibrium problem; Stackelberg problem; multi-leader-follower game; ratiobounded game; potential game; Nash equilibrium; existence and uniqueness; local variation method; global convergence; error estimation
    Scope: 1 Online-Ressource (circa 28 Seiten), Illustrationen